{
    "1": {
        "method": "addColumn",
        "params": [
            "blog_comments",
            {
                "name": "comment_approved",
                "type": "int",
                "length": 1,
                "allow_null": false,
                "default": 0
            }
        ]
    },
    "2": {
        "method": "update",
        "params": [
            "blog_comments",
            {
                "comment_approved": 1
            },
            [
                "comment_queued=?",
                "0"
            ]
        ]
    },
    "3": {
        "method": "update",
        "params": [
            "blog_comments",
            {
                "comment_approved": 0
            },
            [
                "comment_queued=?",
                "1"
            ]
        ]
    }
}